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This might seem like a bit of common sense but not all are aware of what is involved. Cycling a marine tank is much the same as cycling a freshwater tank with a few differences. Since there are 3 main kinds of marine tank let's look at all 3 of these and see what is involved in all 3. But first, there a few things that applies to all 3. Never cycle a marine tank with fish. This includes the ever popular Damsels. While cycling with Damsels is never recommended, you might get away with it if you are